A single-shaft drive system for a wind turbine

Abstract

The application discloses a single-shaft driving system of a wind turbine, which comprises a nacelle and a fan blade arranged at one end of the nacelle, a shaft pipe arranged on the side wall of the fan blade, the shaft pipe being rotatably connected to the nacelle and extending into the nacelle, a rotating disconnecting device, a first intelligent connecting device, a self-switching gear device, a second intelligent connecting device and a generator arranged in sequence on the inner wall of the nacelle; the rotating disconnecting device comprises a rotating pipe, a magnetic attraction component arranged on the outer wall of the rotating pipe and a self-expanding clamping component arranged on the inner wall of the rotating pipe; the self-switching gear device comprises a linear switching component and a plurality of gear boxes arranged on the execution end of the linear switching component; the first intelligent connecting device comprises a shaft rod, a gear disc, a positioning ring and a limiting plug-in component arranged in sequence on the outer wall of the shaft rod, the limiting plug-in component being plug-in fixedly arranged on the plug-in disc arranged at the input end of the gear box, and the side wall of the positioning ring being provided with an unlocking component. The application is a driving system which is convenient for switching the gear box and is convenient for high-efficiency power generation.

Description

Technical Field

[0001] This invention relates to the technical field of wind power generation, specifically a single-shaft drive system for a wind turbine generator set. Background Technology

[0002] Wind power generation refers to converting the kinetic energy of wind into electrical energy. Wind energy is a clean and pollution-free renewable energy source, but the amount of wind energy is uncertain, which affects the power output of wind power generation.

[0003] According to patent application CN201820105728.4, a main drive system for a wind turbine generator set includes a main shaft, a gearbox, a gearbox-side assembly with a brake disc, a diaphragm coupling intermediate, a diaphragm coupling assembly, a permanent magnet coupling buffer protector, and a generator. The input end of the gearbox is connected to the main shaft, and the output end of the gearbox is connected to the gearbox-side assembly with the brake disc. The gearbox-side assembly with the brake disc is connected to the diaphragm coupling assembly via the diaphragm coupling intermediate. The diaphragm coupling assembly is directly or indirectly connected to one rotor of the permanent magnet coupling buffer protector, and the other rotor of the permanent magnet coupling buffer protector is connected to the generator to transmit torque. This product has good resistance to impact and torsional vibration, and features automatic overload slippage protection and reset functions, protecting the gearbox. It also reduces system vibration and noise, extending equipment lifespan and lowering subsequent maintenance costs.

[0004] The products in the aforementioned patents have good resistance to impact and torsional vibration, and have overload automatic slippage protection and reset functions, but they are not convenient for switching and adjusting the gearbox, and are not convenient for efficient power generation. Summary of the Invention

[0005] This invention provides a single-shaft drive system for wind turbine generator sets to solve the technical problems mentioned in the background section.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0007] A single-shaft drive system for a wind turbine generator set includes a nacelle and a fan blade located at one end of the nacelle. The fan blade has a shaft tube on its sidewall, which is rotatably connected to the nacelle and extends into the nacelle. The bottom of the inner wall of the nacelle is provided with a counting component for calculating the number of rotations of the shaft tube. The inner wall of the nacelle, along the direction away from the shaft tube, is provided with a rotation disconnection device, a first intelligent connection device, a self-switching gear device, a second intelligent connection device, and a generator connected in sequence. The first intelligent connection device and the second intelligent connection device have the same structure and are symmetrically distributed.

[0008] The rotating disconnection device includes a rotating tube with one end fixed to the bottom of the inner wall of the cabin via a bearing seat and the other end extending into the shaft tube, a magnetic suction component sleeved on the outer wall of the rotating tube, and a self-expanding snap-fit ​​component provided on the inner wall of the rotating tube and with the actuating end penetrating through the rotating tube and the shaft tube.

[0009] The self-switching gear device includes a linear switching component located at the bottom of the inner wall of the cabin, and multiple gearboxes located at the actuating end of the linear switching component.

[0010] The first intelligent connection device includes a shaft connected at one end to the end of a rotating tube, a gear disk, a positioning ring, and a limiting plug-in component sequentially sleeved on the outer wall of the shaft along a direction away from the rotating tube. The limiting plug-in component is plugged into a plug-in plate fixed at the input end of the gearbox. The top of the inner wall of the cabin is provided with a plug-in fine-tuning component for driving the gear disk to rotate, and the side wall of the positioning ring is provided with an unlocking component for separating the limiting plug-in component from the plug-in plate.

[0011] Preferably, the counting component includes a toothed ring sleeved on the outer wall of the shaft tube, an absolute encoder disposed at the bottom of the inner wall of the cabin, and a driven gear disposed at the actuating end of the absolute encoder and meshing with the toothed ring. In this preferred embodiment, the counting component facilitates the recording of the number of rotations of the shaft tube, thereby facilitating the relative positioning between the shaft tube and the rotating tube.

[0012] Preferably, the magnetic attraction component is fitted onto multiple electromagnetic rings on the outer wall of the rotating tube. In this preferred embodiment, the magnetic attraction component facilitates quick connection between the shaft tube and the rotating tube.

[0013] Preferably, the self-retractable snap-fit ​​component includes a conical block slidably connected to the inner wall of the rotating tube, a drive motor disposed on the inner wall of the rotating tube, a lead screw disposed on the actuating end of the drive motor and connected to the conical block by a lead screw nut, a plurality of snap-fit ​​blocks having one end abutting against the conical surface of the conical block and the other end sequentially penetrating the rotating tube and the shaft tube, and a first spring sleeved on the outer wall of the snap-fit ​​block for pressing the snap-fit ​​block against the conical surface of the conical block. In this preferred embodiment, the self-retractable snap-fit ​​component facilitates a stable mechanical connection between the shaft tube and the rotating tube.

[0014] Preferably, the sidewall of the shaft tube is provided with a buffer auxiliary rotating component. The buffer auxiliary rotating component includes an extension hole passing through the sidewall of the shaft tube and through which the snap-fit ​​block passes, buffer blocks symmetrically arranged in the extension hole, a buffer rod with one end connected to the buffer block and the other end extending into the shaft tube, and a second spring sleeved on the outer wall of the buffer rod. In this preferred embodiment, the buffer auxiliary rotating component facilitates the buffer protection of the self-expanding snap-fit ​​component during the gradual synchronous rotation of the rotating tube and the shaft tube.

[0015] Preferably, the linear switching component includes a first linear guide rail disposed at the bottom of the cabin inner wall, and a movable plate disposed at the actuating end of the first linear guide rail, wherein a plurality of gearboxes are connected to the upper surface of the movable plate. In this preferred embodiment, the linear switching component facilitates switching different gearboxes to the working state.

[0016] Preferably, the limiting insertion component includes an insertion base plate disposed at the end of the shaft, a movable plate located on the side of the insertion base plate near the positioning ring and sleeved on the outside of the shaft, a plurality of insertion limiting rods with one end connected to the side wall of the movable plate and the other end penetrating through the insertion base plate, and a third spring sleeved on the outer wall of the shaft and located between the positioning ring and the movable plate, wherein the insertion limiting rods are inserted into the insertion plate. In this preferred embodiment, the limiting insertion component facilitates the quick connection or separation of the gearbox and the main shaft transmission system.

[0017] Preferably, the insertion fine-tuning component includes multiple drive cylinders disposed on the top of the inner wall of the cabin, a second linear guide rail disposed on the actuating end of the drive cylinders, and a rack disposed on the actuating end of the second linear guide rail. In this preferred embodiment, the insertion fine-tuning component facilitates the rotational adjustment of the limiting insertion component, so as to facilitate the insertion of the limiting insertion component into the insertion plate.

[0018] Preferably, the unlocking component includes a plurality of electric cylinders disposed on the side wall of the positioning ring, and an unlocking pull plate disposed on the actuating end of the electric cylinders. In this preferred embodiment, the unlocking component facilitates the separation of the limiting insertion component and the insertion plate.

[0019] Preferably, the inner wall of the cabin is provided with a first braking component sleeved on the outside of the shaft tube, and the inner wall of the cabin is provided with a second braking component sleeved on the outside of the rotating tube. The first braking component and the second braking component have the same structure. The first braking component includes a brake disc sleeved on the outer wall of the shaft tube, and a plurality of brake calipers disposed on the inner wall of the cabin for braking the brake disc. In this preferred embodiment, the first braking component facilitates braking of the rotating tube to facilitate the operation of the self-retracting locking component, and the second braking component facilitates braking of the rotating tube.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] The drive system in this invention facilitates the switching and adjustment of the gearbox, and enables efficient power generation;

[0022] The rotating disconnection device facilitates the connection or separation between the drive system and the fan blades, so as to keep the drive system stopped when the gearbox is switched. The rotating disconnection device uses a counting component to record the number of rotations of the shaft tube, so as to facilitate the relative positioning between the shaft tube and the rotating tube. The magnetic suction component facilitates the quick connection between the shaft tube and the rotating tube, and the self-expanding snap-fit ​​component facilitates the mechanically stable connection between the shaft tube and the rotating tube.

[0023] The first and second intelligent connection devices facilitate the connection or separation between the gearbox and the drive system. The first intelligent connection device facilitates the quick connection or separation between the gearbox and the main shaft transmission system through the limiting plug-in component. The plug-in fine adjustment component facilitates the rotation adjustment of the limiting plug-in component so that the limiting plug-in component can be plugged into the plug-in plate. The unlocking component facilitates the separation of the limiting plug-in component and the plug-in plate.

[0024] The buffer auxiliary rotating component facilitates the gradual synchronous rotation of the rotating tube and the shaft tube, providing buffer protection for the self-expanding snap-fit ​​component. The linear switching component facilitates switching different gearboxes to the working state. The first braking component facilitates braking of the rotating tube to enable the self-expanding snap-fit ​​component to work. The second braking component facilitates braking of the rotating tube.

[0025] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0026] Figure 1 This is an isometric view of the overall structure of the present invention;

[0027] Figure 2 This is an exploded view of the overall structure of the present invention;

[0028] Figure 3 This is an exploded view of the cabin interior structure of the present invention;

[0029] Figure 4 This is an exploded view of the rotating disconnection device of the present invention;

[0030] Figure 5 This is a cross-sectional view of the overall structure of the present invention;

[0031] Figure 6 This is a cross-sectional view of the self-expanding snap-fit ​​component structure of the present invention;

[0032] Figure 7 This is a cross-sectional view of the buffer auxiliary rotating component structure of the present invention;

[0033] Figure 8 This is an enlarged view of the structure at point A of the present invention.

[0034] Figure Descriptions: 10. Cabin; 11. Fan Blade; 12. Shaft Tube; 13. First Braking Component; 131. Brake Disc; 132. Brake Caliper; 14. Counting Component; 141. Toothed Ring; 142. Absolute Encoder; 143. Driven Gear; 15. Buffer Auxiliary Rotary Component; 151. Extension Hole; 152. Buffer Block; 153. Buffer Rod; 154. Second Spring; 20. Rotation Disconnection Device; 21. Rotating Tube; 22. Magnetic Attachment Component; 221. Electromagnetic Ring; 23. Self-Extending Snap-fit ​​Component; 231. Conical Block; 232. Drive Motor; 233. Lead Screw; 234. Snap-fit ​​Block; 235. First Spring; 24. Two braking components; 30, First intelligent connecting device; 31, Shaft; 32, Gear disk; 33, Positioning ring; 34, Limiting insertion component; 341, Insertion base disk; 342, Moving disk; 343, Insertion limiting rod; 344, Third spring; 35, Insertion disk; 36, Insertion fine-tuning component; 361, Drive cylinder; 362, Second linear guide rail; 363, Rack; 37, Unlocking component; 371, Electric cylinder; 372, Unlocking pull plate; 40, Self-switching gear device; 41, Linear switching component; 411, First linear guide rail; 412, Moving plate; 42, Gearbox; 50, Second intelligent connecting device; 60, Generator. Detailed Implementation

[0035] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] Please refer to the appendix carefully. Figure 1-7As shown, in a preferred embodiment of the present invention, a single-shaft drive system for a wind turbine generator set includes a nacelle 10 and a fan blade 11 disposed at one end of the nacelle 10. The fan blade 11 has a shaft tube 12 on its sidewall, which is rotatably connected to the nacelle 10 and extends into the nacelle 10. A counting component 14 for calculating the number of rotations of the shaft tube 12 is provided at the bottom of the inner wall of the nacelle 10. A rotation disconnection device 20, a first intelligent connection device 30, a self-switching gear device 40, a second intelligent connection device 50, and a generator 60 are sequentially connected on the inner wall of the nacelle 10 in a direction away from the shaft tube 12. The first intelligent connection device 30 and the second intelligent connection device 50 have the same structure. Furthermore, they are symmetrically distributed; the rotating disconnection device 20 includes a rotating tube 21 with one end fixed to the bottom of the inner wall of the cabin 10 via a bearing seat and the other end extending into the shaft tube 12, a magnetic suction component 22 sleeved on the outer wall of the rotating tube 21, and a self-expanding snap-fit ​​component 23 disposed on the inner wall of the rotating tube 21 with its actuating end penetrating through the rotating tube 21 and the shaft tube 12; the counting component 14 includes a toothed wall ring 141 sleeved on the outer wall of the shaft tube 12, an absolute encoder 142 disposed at the bottom of the inner wall of the cabin 10, and a driven gear 143 disposed at the actuating end of the absolute encoder 142 and meshing with the toothed wall ring 141, and a plurality of electromagnetic rings 22 sleeved on the outer wall of the rotating tube 21 by the magnetic suction component 22. 1. The self-expanding snap-fit ​​component 23 includes a conical block 231 slidably connected to the inner wall of the rotating tube 21, a drive motor 232 disposed on the inner wall of the rotating tube 21, a lead screw 233 disposed on the actuating end of the drive motor 232 and connected to the conical block 231 by a lead screw nut, a plurality of snap-fit ​​blocks 234 having one end abutting against the conical surface of the conical block 231 and the other end sequentially penetrating the rotating tube 21 and the shaft tube 12, and a first spring 235 sleeved on the outer wall of the snap-fit ​​block 234 for pressing the snap-fit ​​block 234 against the conical surface of the conical block 231. The side wall of the shaft tube 12 is provided with a buffer auxiliary rotating component 15, the buffer auxiliary rotating component 15 including an extension hole 151 penetrating the side wall of the shaft tube 12 and allowing the snap-fit ​​block 234 to pass through. A buffer block 152 is provided in the extension hole 151, a buffer rod 153 is connected to the buffer block 152 at one end and extends into the shaft tube 12 at the other end, and a second spring 154 is sleeved on the outer wall of the buffer rod 153. A first braking component 13 is provided on the inner wall of the engine compartment 10 and sleeved on the outside of the shaft tube 12. A second braking component 24 is provided on the inner wall of the engine compartment 10 and sleeved on the outside of the rotating tube 21. The first braking component 13 and the second braking component 24 have the same structure. The first braking component 13 includes a brake disc 131 sleeved on the outer wall of the shaft tube 12 and a plurality of brake calipers 132 provided on the inner wall of the engine compartment 10 for braking the brake disc 131.

[0039] It should be noted that in this embodiment, when the wind power is generated, the fan blade 11 drives the shaft tube 12 to rotate, and the shaft tube 12 drives the rotating tube 21 to rotate under the action of the self-expanding snap-fit ​​component 23. The rotating tube 21 drives the input end of one of the gearboxes 42 to work through the first intelligent connection device 30, and the output end of one of the gearboxes 42 drives the execution end of the generator 60 to rotate through the second intelligent connection device 50, and the generator 60 generates electricity.

[0040] When the gearbox 42 needs to be switched, the rotating tube 21 needs to be disconnected from the shaft tube 12. Before disconnection, the first braking component 13 reduces the speed of the shaft tube 12. The actuator of the drive motor 232 drives the lead screw 233 to rotate. The lead screw 233 drives the conical block 231 to move outward. The first spring 235 drives the locking block 234 to move downward. After the locking block 234 leaves the shaft tube 12, the second braking component 24 brakes the rotating tube 21. At the same time, the counting component 14 starts to record the number of rotations of the shaft tube 12. At this time, the rotating tube 21 stops rotating, and the gearbox 42 can be switched and adjusted.

[0041] When it is necessary to restore the connection between the rotating tube 21 and the shaft tube 12, when the counting component 14 records the number of whole revolutions of the shaft tube 12, the electromagnetic ring 221 magnetically attracts the inner wall of the shaft tube 12 so that the rotating tube 21 and the shaft tube 12 rotate synchronously. At this time, the actuator of the drive motor 232 drives the lead screw 233 to rotate, the lead screw 233 drives the conical block 231 to move inward, and the conical block 231 drives the snap-fit ​​block 234 to move upward. After the snap-fit ​​block 234 enters the extension hole 151, the electromagnetic ring 221 is de-energized. As the shaft tube 12 rotates, the buffer block 152 in the extension hole 151 abuts against the side wall of the snap-fit ​​block 234, and the second spring 154 buffers. After the second spring 154 is compressed to the limit position, the shaft tube 12 and the rotating tube 21 move synchronously.

[0042] Furthermore, taking the operation of the first braking component 13 as an example, the brake caliper 132 clamps the brake disc 131 to perform braking;

[0043] Furthermore, when the counting component 14 is working, the shaft tube 12 drives the toothed ring 141 to rotate, the toothed ring 141 drives the driven gear 143 to rotate, the driven gear 143 drives the input end of the absolute encoder 142 to rotate, the absolute encoder 142 transmits the rotation number data of the driven gear 143 to the controller, and the controller calculates the rotation number data of the toothed ring 141.

[0044] Please refer to the appendix carefully. Figure 2 , 3As shown in Figure 5, in another preferred embodiment of the present invention, the self-switching gear device 40 includes a linear switching component 41 disposed at the bottom of the inner wall of the cabin 10, and a plurality of gearboxes 42 disposed at the execution end of the linear switching component 41; the linear switching component 41 includes a first linear guide rail 411 disposed at the bottom of the inner wall of the cabin 10, and a moving plate 412 disposed at the execution end of the first linear guide rail 411, wherein the upper surface of the moving plate 412 is connected to the plurality of gearboxes 42.

[0045] It should be noted that in this embodiment, the first linear guide 411 drives the moving plate 412 to move, and the moving plate 412 drives multiple gearboxes 42 to move so as to move one of the gearboxes 42 to the working position.

[0046] Furthermore, the gearbox 42 with a suitable transmission ratio can be moved to the working position according to the wind speed.

[0047] Please refer to the appendix carefully. Figure 2 , 3 As shown in Figures 5, 6, and 8, in another preferred embodiment of the present invention, the first intelligent connection device 30 includes a shaft 31 connected at one end to the end of the rotating tube 21, a gear disk 32, a positioning ring 33, and a limiting insertion component 34 sequentially sleeved on the outer wall of the shaft 31 in a direction away from the rotating tube 21. The limiting insertion component 34 is inserted into and fixed to a insertion plate 35 at the input end of the gearbox 42. A fine-tuning insertion component 36 for driving the gear disk 32 to rotate is provided on the top of the inner wall of the cabin 10. An unlocking component 37 for separating the limiting insertion component 34 from the insertion plate 35 is provided on the side wall of the positioning ring 33. The limiting insertion component 34 includes an insertion base plate 341 provided at the end of the shaft 31, and the insertion base plate 341 is located near the positioning ring 33. The movable disk 342 is sleeved on the outside of the shaft 31. One end of the movable disk 342 is connected to the side wall of the movable disk 342 and the other end passes through the insertion base disk 341. A third spring 344 is sleeved on the outer wall of the shaft 31 and located between the positioning ring 33 and the movable disk 342. The insertion limiting rod 343 is inserted into the insertion disk 35. The insertion fine adjustment component 36 includes a plurality of drive cylinders 361 located on the top of the inner wall of the cabin 10, a second linear guide rail 362 located at the execution end of the drive cylinder 361, and a rack 363 located at the execution end of the second linear guide rail 362. The unlocking component 37 includes a plurality of electric cylinders 371 located on the side wall of the positioning ring 33, and an unlocking pull plate 372 located at the execution end of the electric cylinder 371.

[0048] It should be noted that, in this embodiment, taking the operation of the first intelligent connection device 30 as an example, the electric cylinder 371 drives the unlocking pull plate 372 to move, and the unlocking pull plate 372 drives the moving disk 342 to move so that the insertion limit rod 343 leaves the insertion disk 35. At this time, the gearbox 42 can be switched. After the switching is completed, the electric cylinder 371 drives the unlocking pull plate 372 to reset, and the third spring 344 drives the moving disk 342 to reset. At this time, the drive cylinder 361 drives the second linear guide rail 362 to move down until the rack 363 meshes with the gear disk 32. The second linear guide rail 362 drives the rack 363 to move so as to drive the shaft 31 to rotate so that the insertion limit rod 343 can be inserted into the insertion disk 35.

[0049] The specific process of this invention is as follows:

[0050] The controller model is "KV-40DT".

[0051] When generating wind power, the fan blade 11 drives the shaft tube 12 to rotate. The shaft tube 12 drives the rotating tube 21 to rotate under the action of the self-expanding snap-fit ​​component 23. The rotating tube 21 drives the input end of one of the gearboxes 42 to work through the first intelligent connection device 30. The output end of one of the gearboxes 42 drives the execution end of the generator 60 to rotate through the second intelligent connection device 50. The generator 60 generates electricity.

[0052] When the gearbox 42 needs to be switched, the rotating tube 21 needs to be disconnected from the shaft tube 12. Before disconnection, the first braking component 13 reduces the speed of the shaft tube 12. The actuator of the drive motor 232 drives the lead screw 233 to rotate. The lead screw 233 drives the conical block 231 to move outward. The first spring 235 drives the locking block 234 to move downward. After the locking block 234 leaves the shaft tube 12, the second braking component 24 brakes the rotating tube 21. At the same time, the counting component 14 starts to record the number of rotations of the shaft tube 12. At this time, the rotating tube 21 stops rotating, and the gearbox 42 can be switched and adjusted.

[0053] When it is necessary to restore the connection between the rotating tube 21 and the shaft tube 12, when the counting component 14 records the number of whole revolutions of the shaft tube 12, the electromagnetic ring 221 magnetically attracts the inner wall of the shaft tube 12 so that the rotating tube 21 and the shaft tube 12 rotate synchronously. At this time, the actuator of the drive motor 232 drives the lead screw 233 to rotate, the lead screw 233 drives the conical block 231 to move inward, and the conical block 231 drives the snap-fit ​​block 234 to move upward. After the snap-fit ​​block 234 enters the extension hole 151, the electromagnetic ring 221 is de-energized. As the shaft tube 12 rotates, the buffer block 152 in the extension hole 151 abuts against the side wall of the snap-fit ​​block 234, and the second spring 154 buffers. After the second spring 154 is compressed to the limit position, the shaft tube 12 and the rotating tube 21 move synchronously.

[0054] Taking the operation of the first braking component 13 as an example, the brake caliper 132 clamps the brake disc 131 to perform braking;

[0055] When the counting component 14 is working, the shaft tube 12 drives the toothed ring 141 to rotate, the toothed ring 141 drives the driven gear 143 to rotate, the driven gear 143 drives the input end of the absolute encoder 142 to rotate, and the absolute encoder 142 transmits the rotation number data of the driven gear 143 to the controller, and the controller calculates the rotation number data of the toothed ring 141.

[0056] The first linear guide 411 drives the moving plate 412 to move, and the moving plate 412 drives multiple gearboxes 42 to move one of the gearboxes 42 to the working position.

[0057] The gearbox 42 with a suitable transmission ratio can be moved to the working position according to the wind speed;

[0058] Taking the operation of the first intelligent connection device 30 as an example, the electric cylinder 371 drives the unlocking pull plate 372 to move, and the unlocking pull plate 372 drives the moving disk 342 to move so that the insertion limit rod 343 leaves the insertion disk 35. At this time, the gearbox 42 can be switched. After the switching is completed, the electric cylinder 371 drives the unlocking pull plate 372 to reset, and the third spring 344 drives the moving disk 342 to reset. At this time, the drive cylinder 361 drives the second linear guide rail 362 to move down until the rack 363 meshes with the gear disk 32. The second linear guide rail 362 drives the rack 363 to move so as to drive the shaft 31 to rotate so that the insertion limit rod 343 can be inserted into the insertion disk 35.

[0059] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A single-shaft drive system for a wind turbine generator set, comprising a nacelle (10) and a fan blade (11) disposed at one end of the nacelle (10), characterized in that... The fan blade (11) has a shaft tube (12) on its side wall. The shaft tube (12) is rotatably connected to the nacelle (10) and extends into the nacelle (10). The bottom of the inner wall of the nacelle (10) is provided with a counting component (14) for calculating the number of rotations of the shaft tube (12). The inner wall of the nacelle (10) and along the direction away from the shaft tube (12) are provided with a rotating disconnection device (20), a first intelligent connection device (30), a self-switching gear device (40), a second intelligent connection device (50), and a generator (60) connected in sequence. The first intelligent connection device (30) and the second intelligent connection device (50) have the same structure and are symmetrically distributed. The rotating disconnection device (20) includes a rotating tube (21) with one end fixed to the bottom of the inner wall of the cabin (10) by a bearing seat and the other end extending into the shaft tube (12), a magnetic suction component (22) sleeved on the outer wall of the rotating tube (21), and a self-expanding snap-fit ​​component (23) provided on the inner wall of the rotating tube (21) and whose actuating end passes through the rotating tube (21) and the shaft tube (12). The self-switching gear device (40) includes a linear switching component (41) located at the bottom of the inner wall of the cabin (10), and a plurality of gearboxes (42) located at the actuating end of the linear switching component (41). The first intelligent connection device (30) includes a shaft (31) with one end connected to the end of the rotating tube (21), a gear disk (32), a positioning ring (33), and a limiting plug-in component (34) sequentially sleeved on the outer wall of the shaft (31) in a direction away from the rotating tube (21). The limiting plug-in component (34) is plugged into a plug-in plate (35) fixed to the input end of the gearbox (42). The top of the inner wall of the cabin (10) is provided with a plug-in fine-tuning component (36) for driving the gear disk (32) to rotate. The side wall of the positioning ring (33) is provided with a release mechanism for separating the limiting plug-in component (34) from the plug-in plate (35). The locking component (37) includes a self-expanding snap-fit ​​component (23) comprising a conical block (231) slidably connected to the inner wall of the rotating tube (21), a drive motor (232) disposed on the inner wall of the rotating tube (21), a lead screw (233) disposed on the actuating end of the drive motor (232) and connected to the conical block (231) by a lead screw (233), a plurality of snap-fit ​​blocks (234) with one end abutting against the conical surface of the conical block (231) and the other end passing through the rotating tube (21) and the shaft tube (12) in sequence, and a first spring (235) sleeved on the outer wall of the snap-fit ​​block (234) and used to press the snap-fit ​​block (234) against the conical surface of the conical block (231).

2. The single-shaft drive system for a wind turbine generator set according to claim 1, characterized in that, The counting component (14) includes a toothed ring (141) sleeved on the outer wall of the shaft tube (12), an absolute encoder (142) located at the bottom of the inner wall of the cabin (10), and a driven gear (143) located at the actuating end of the absolute encoder (142) and meshing with the toothed ring (141).

3. The single-shaft drive system for a wind turbine generator set according to claim 1, characterized in that, The magnetic attraction component (22) is fitted onto the outer wall of the rotating tube (21) with multiple electromagnetic rings (221).

4. The single-shaft drive system for a wind turbine generator set according to claim 1, characterized in that, The side wall of the shaft tube (12) is provided with a buffer auxiliary rotating component (15). The buffer auxiliary rotating component (15) includes an extension hole (151) that passes through the side wall of the shaft tube (12) and allows the snap-fit ​​block (234) to pass through, a buffer block (152) symmetrically arranged in the extension hole (151), a buffer rod (153) with one end connected to the buffer block (152) and the other end extending into the shaft tube (12), and a second spring (154) sleeved on the outer wall of the buffer rod (153).

5. A single-shaft drive system for a wind turbine generator set according to claim 1, characterized in that, The linear switching component (41) includes a first linear guide rail (411) located at the bottom of the inner wall of the cabin (10) and a moving plate (412) located at the actuating end of the first linear guide rail (411). Multiple gearboxes (42) are connected to the upper surface of the moving plate (412).

6. A single-shaft drive system for a wind turbine generator set according to claim 1, characterized in that, The limiting insertion component (34) includes an insertion base plate (341) disposed at the end of the shaft (31), a movable plate (342) located on the side of the insertion base plate (341) near the positioning ring (33) and sleeved on the outside of the shaft (31), a plurality of insertion limiting rods (343) with one end connected to the side wall of the movable plate (342) and the other end penetrating through the insertion base plate (341), and a third spring (344) sleeved on the outer wall of the shaft (31) and located between the positioning ring (33) and the movable plate (342), wherein the insertion limiting rod (343) is inserted into the insertion plate (35).

7. A single-shaft drive system for a wind turbine generator set according to claim 1, characterized in that, The plug-in fine-tuning component (36) includes a plurality of drive cylinders (361) located on the top of the inner wall of the cabin (10), a second linear guide (362) located at the actuating end of the drive cylinder (361), and a rack (363) located at the actuating end of the second linear guide (362).

8. A single-shaft drive system for a wind turbine generator set according to claim 1, characterized in that, The unlocking component (37) includes a plurality of electric cylinders (371) disposed on the side wall of the positioning ring (33), and an unlocking pull plate (372) disposed on the actuating end of the electric cylinders (371).

9. A single-shaft drive system for a wind turbine generator set according to claim 1, characterized in that, The inner wall of the engine compartment (10) is provided with a first braking component (13) sleeved on the outside of the shaft tube (12), and the inner wall of the engine compartment (10) is provided with a second braking component (24) sleeved on the outside of the rotating tube (21). The first braking component (13) and the second braking component (24) have the same structure. The first braking component (13) includes a brake disc (131) sleeved on the outer wall of the shaft tube (12) and a plurality of brake calipers (132) provided on the inner wall of the engine compartment (10) for braking the brake disc (131).

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